OEM Carrier Spark Electrode Ignitor (48VL400002) for Model PY4GEAA36090AA

This is the OEM Carrier spark electrode ignitor assembly, factory part number 48VL400002 (superseded by 50HJ403022), engineered as the direct replacement for the Carrier PY4GEAA36090AA packaged gas/electric unit. The spark electrode ignitor is a critical component in the gas ignition sequence: on a call for heat, the control board energizes the ignitor to generate a high-voltage spark at the burner, igniting the gas flow. When this part fails, the unit will attempt ignition, fail to establish a flame, and enter a safety lockout — leaving you with a blower running but no heat. Fault codes related to ignition failure or repeated lockout are the most common symptoms of a worn or cracked electrode.

• Part Numbers: OEM part 48VL400002 | Direct OEM successor: 50HJ403022 | Fits Carrier, Bryant, and Payne packaged units sharing this ignition assembly
• OEM vs Generic: OEM electrodes are manufactured to exact factory gap and ceramic insulator specifications. Aftermarket igniters often use inferior ceramics that crack under thermal stress, causing intermittent no-heat calls and repeat service visits.
• Install Difficulty: 2/5 — Shut off power and gas supply before servicing. Tools needed: 1/4" and 5/16" nut drivers, needle-nose pliers. Locate the electrode assembly at the burner assembly; disconnect the ignition wire, remove the mounting screw(s), and reverse to install. Handle the ceramic insulator carefully — do not touch the electrode tip with bare hands.
• Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PY4GEAA36090AA packaged unit. Note that OEM part 48VL400002 has been officially superseded by Carrier part 50HJ403022 — both are the correct, factory-approved ignitor assemblies for this application. Verify your existing part number on the unit's data plate or existing ignitor label before ordering. Our team is available to confirm fitment — reach out before you buy if you have any questions. In stock and ships today.